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J. R. MARKLE 86 J. B. WAYNE. MECHANISM-FOB, DRIVING DYNAMO ELEGTRIG MACHINES. No. 298.482. Patented Feb. 12, 1884.

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3 Sheets-Sheet 2. J. R. MARKLE & J B. WAYNE. MECHANISM FOR DRIVING DYNAMO ELECTEIC MACHINES. No. 298,482. Patented-Feb. 12, 1884.

(No Model.)

- 3 Sheets-Sheet 3. J. R. MARKLE & J. B. WAYNE.

MECHANISM FOR DRIVING DYNAMO ELECTRIC MAGHINES.

No. 293,482. Patented Feb. 12, 1884.

(No Model.)

WITNESSES WVBUOR w m i f l lav-x'izo tw I orney UNITED STATES PATENT OFFICE.

JOHN B. MABKLE, OF CHICAGO, ILLINOIS, AND JAMES B. IVAYNE, OF DETROIT, MICHIGAN;

MECHANISM FOR DRIVING DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 293,482, dated February 12, 1884.

Application filed Fehrua1-y10,1883. (No model.)

To (bZZ w/wm it may concern:

Be it known that we, JOHN It. M.-iRKLE,of the city of Chicago, in the county of Cook and State of Illinois, and JAMES B. WAYNE, of the city of Detroit, in the county of \Vayne and State of Michigan, have invented a new and useful Improvement in the Method of Driving Dynamo-Electric Machines, of which the following is a specification.

Figure 1 is a plan view with the frictionpulley in section. Fig. 2 is a front elevation with part of the friction-pulley broken away, the bearings of the counter-shaft in section, and the pulley on the counter-shaft omitted. Fig. 3 is a plan view with the friction-pulleys in section, showing a modification of our invention for use when it is desired to run several counter-shafts or dynamos from one drivingshaft. Fig. 4c is a side elevation of our'invention as applied directly to the armatureshaft of a dynamo.

In driving dynamo-electric machines by a reciprocating engine having a flywheel on the crankshaft, the speed of the shaft varies, decreasing as the shaft approaches the dead-centers, and this causes fluctuations in the speed of the armature of the dynamo and variations in the electric current.

Our invention aims to equalize the speed of the armature; and it consists in attaching to the crank-shaft a friction-pulley, which engages with afriction-pinion placed on the armature-shaft, or on a counter-shaft provided with a heavy beltpulley, when more speed is required than can be obtained by direct connection with the armature-shaft.

A represents the crank-shaft of a recipro cating steam-engine, A being the crank, and A a wrist-pin thereon.

B represents a friction-pulley, fastened on shaft A.

D represents a shaft journaled in bearings H H, which may be a counter-shaft, Figs. 1, 2, 3, or the armature-shaft of a dynamo, Fig.

engaging with frictionpulley B. IVhen shaft D is used as a counter-shaft to obtain speed, we secure on it a belt-pulley, E, from which a belt runs to a smaller pulley on the armatureshaft, and usually a fly-wheel, F, though this may be dispensed with by making the rim of pulley E heavy enough to act as a fiy-wheel. \Vhen shaft D is the armature-shaft, the armature is generally heavy enough to act as a flywheel. Bearings II H are set by a dovetail joint, M M, in a suitable frame, G, and lugs on the lower surface thereof engage with the threaded ends of rods I I, set rotatablyin frame G, and provided with hand-wheels K K, by which said rods can be rotated, and the position of bearings H H changed to regulate the pressure between pulley B and pinion C.

In Fig. 3 is shown an arrangement by which our invention can be arranged to drive four dynamos from a single shaft. The various parts are mere reduplications of the similarlylettered parts in Figs. 1 and 2, and the operation is too obvious to need description.

By transmitting the power through friction mechanism from the engine to the dynamo, either directly or through the medium of a countershaft, and weighting a wheel or pul- [4, on which is fastened a friction-pinion, C, 5

ley on the driven shaft to act as a fly-wheel,

we prevent, in a large measure, any variation in speed of the armature, and thus produce a steady current.

IVhat we claim as our invention, and desire to secure by Letters Patent, is-

The combination, with the crank-shaft of a reciprocating steam-engine, of a counter-shaft driven from the crankshaft, and having thereon a flywheel, substantially as and for the purposes set forth.

JOHN B. MABKLE. JAMES B. IVAYNE. XVitnesses:

SUMNER GoLLINs, GEO. H. Lornnor. 

